Decibel X - Professional Sound Level Meter

iOS download link: https://itunes.apple.com/app/id448155... Android download link: https://play.google.com/store/apps/de... =========================================== "Decibel X" is one of very few sound meter apps on the market that has highly reliable, pre-calibrated measurements and supports frequency weightings: ITU-R 468, A and C. It turns your phone device into a professional sound meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful sound meter tool will not only be an essential gadget for many uses but also bring you a lot of fun.